Zr-Nb合金的微弧阳极氧化表面改性  

Surface Modification of Zr-Nb Alloy by Micro-Arc Anodic Oxidation

作　　者：张岱岚[1] 白新德[1] 李娟[1] 陈建新[2] 伍志明[2] 朱国胜[2] 

机构地区：[1]清华大学教育部先进材料重点实验室,北京100084 [2]建中化工公司,四川宜宾644000

出　　处：《稀有金属材料与工程》2007年第6期1085-1087,共3页Rare Metal Materials and Engineering

基　　金："973"项目(G200067207)资助

摘　　要：利用微弧氧化技术,以NaOH为电解液,对Zr-Nb合金进行表面处理,以改善其抗溶液腐蚀性能。利用SEM观察到Zr-Nb合金微弧氧化膜厚约8μm,膜层为一连续整体,厚度均匀,与基体结合牢固。X射线衍射分析表明,微弧氧化膜主要由四方和单斜相的二氧化锆组成。通过电化学极化曲线测量,对Zr-Nb合金微弧氧化膜的抗腐蚀性能进行了评价,结果表明,氧化膜抗腐蚀性能比基体提高显著。The process of surface modification by the micro-arc oxidation using NaOH as electrolyte was introduced in this article. It is indicated by scanning electron microscope （SEM） that the Zirconium oxide coating is continuous and homogenous with a thickness of up to 8μm, tightly combined with the substrate. X-ray diffraction confirmed that the significant crystalline phases were m-ZrO2 and t-ZrO2 in the coating. It is found that the corrosion-resistant of coating is distinctly enhanced at room temperature according to the polarization curves.

关 键 词：Zr-Nb合金 微弧氧化 阳极火花沉积 电介击穿 

分 类 号：TG174.451[金属学及工艺—金属表面处理]